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작성자 : 관리자 날짜 : 작성일17-04-13 23:16 조회 : 3,398회본문
제 514 회 생명과학연구소 정기 세미나 2017. 4. 13 (목) 오후 5시, 자5 101호 |
CR6-interacting factor 1 deficiency impairs vascular function
by inhibiting the Sirt1-eNOS pathway
김 국성 교수 (충남대학교)
AIMS:
Mitochondrial dysfunction has emerged as a major contributing factor to endothelial dysfunction and vascular disease, but the key mechanisms underlying mitochondrial dysfunction-induced endothelial dysfunction remain to be elucidated. In this study, we aim to determine whether mitochondrial dysfunction in endothelial cells plays a key role in vascular disease, by examining the phenotype of endothelial-specific CR6-interacting factor 1 (CRIF1) knockout mice. We also used siRNA mediated downregulation of CRIF1 gene in the endothelial cells to study about the in vitro pathophysiological underlying mechanisms.
RESULTS:
Downregulation of CRIF1 in endothelial cells caused disturbances of mitochondrial OXPHOS complexes and membrane potential leading to enhanced mitochondrial reactive oxygen species (ROS) production. Gene silencing of CRIF1 results in decreased SIRT1 expression along with increased eNOS acetylation leading to reduced nitric oxide production in vitro and in vivo. Endothelium-dependent vasorelaxation of aortic rings from CRIF1 knock out (KO) mice were considerably less than in wild-type mice, and it was partially recovered by Sirt1 overexpression in CRIF1 KO mice.
CONCLUSION:
These findings indicate that CRIF1 plays an important role in maintaining mitochondrial and endothelial function through its effects on the SIRT1-eNOS pathway